I agree with 450Donn. I put the Cooper Roadmaster 215/75R17.5 on my 16,400# 5er and now have over 5000 miles and the tires still look perfect. Another advantage is they are only around $250 a piece and readily available at any truck tire dealer that carries Roadmaster tires. They are used on commercial lowboy trailers. The G614 GY's and some of the other trailer tires aren't always carried by the tire shops. You can get them, but it might be 1 or 2 days later.
03 Silverado cclb 3500 drw, D/A, Reese 22k hitch
07 Alfa SeeYa Gold 30RL,2 slides,power everything